Fire-alarm



(No Model.)

J. P. WILLIAMS.

FIRE ALARM. No. 526,599. Patented Sept. 25, 1894.

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'NITED STATES PATENT OFFICEQ JOHN P. WILLIAMS OF SOUTH PITTSBURG,TENNESSEE.

FIRE-ALARM.

SPECIFICATION forming part of Letters Patent No. 526,599, datedSeptember 25, 1894.

Application filed March 15, 1894. Serial No. 503,769. (No model .To allwhom it may concern.-

Be it known that I, J OHN P. WILLIAMS, residing atSouth Pittsburg, inthe county of Marion and State of Tennessee, have invented a new andImproved House Fire-Alarm, of which the following is a specification.

My invention relates to improvements in fire alarms adapted for use inbuildings, such as hotels, apartment houses, schools, and the like andit primarily has for its object to provide an alarm mechanism andoperating means therefor of a very simple and inexpensive construction,easily put up for use and Very effective for its desired purposes.

With other objects in view, which hereinafter will be referred to myinvention consists in the peculiar combination and novel arrangement ofparts first described in detail and then pointed out in the appendedclaims, reference being had to the accompanying drawings, in which-Figure 1 is a diagrammatic view illustrating my invention as applied foruse. Fig. 2 is a face view of the alarm mechanism and the triggerholding means. Fig. 3 is a plan view of a section of the wire, having afusible joint and having the supplemental or expansive portion and thetrigger held in operative connection with the said supplemental portion.

, In its practical construction my improved alarm mechanism when used onbuildings, with a small number of rooms, comprises a single operatingwire, which is arranged to pass through all the rooms and over suitablyarranged guides provided therefor, its ends having weights or springtension devices which will serve to keep the said wire taut. In suchwire (one for each room) are arranged fusible joints, and to such wiresnear the joints are connected the trip members of the alarm devices. Itshould be stated that by providing tension or weight devices for theopposite ends of such wire no matter at which point such wire shouldseparate, the separated sections will be pulled in reverse directionsand in consequence operate all the alarms connected therewith. Whenhowever my improved devices are used in large buildings, such as hotels,I prefer to use one wire for each floor,,which is adapted to passthrough all the rooms on such floor and connect with the alarm devicesin each room. In such arrangement I also prefer to extend one end ofeach of such wires down into the ofiice to connect with one indicatorwhich will serve to locate the particular floor on which the fireoccurs.

Referring now to the accompanying drawings A indicates the main oroperating wire which is arranged to pass through the several rooms overguide rollers a a. At one end such Wire has a weight B, located at aconvenient point in one of the rooms and in practice out of sight, whilethe other end, when the mechanism is used in hotels, extends down intothe hotel office, has a weightO and connects with a trip arm D of anindicator E, but when used in small dwellings such end has a weight B asindicated in dotted lines, Fig. 1.

The wire A is formed of a series of members connected by the fusiblejoints F, one of such joints, as also an alarm mechanism G, beingdisposed in each room.

The alarm mechanism,which is most clearly shown in Fig. 2, except insuch detail as will be presently described is of any well known springactuated construction, the exception being in the construction of thehammer g, which as shown has its stem formed with a curved off hump likeportion g which forms a cam for holding the trip lever H to its normalor set position. The lever H is fulcrumed at 72, to the alarm casing andhas a short lower arm 71. and a longer upper arm 71 The shorter arm h isadapted when swung to a vertical position from either direction toengage the curved portion of hammer stem, and as it does it slightlyforces such hammer down, and while it thus holds such hammer fromringing the bell it in turn is held to its adjusted 01- set position bythe spring tension exerted on the hammer from the operating spring .I.As but a slight movement ineither direction will serve to operate thetripper H, and as the natural expansion of the wire A would serve to doso were such tripper connected directly with it, I provide on such wirea series of supplemental members K, connected at their ends and Ir. withsuch wire A, and such members K have elongated or loop portions K fittedover the end 77. of the said tripper H. By this arrangement it will bereadily seen that as the wire expands and contracts the loop K. willmove freely on such tripper, but in case any one of the fusible jointsmelts and the Wire separates the Wire sections will be pulled on and theloop caused to engage said tripper and move it in either direction.

Having thus described my invention, what I claim, and desire to secureby Letters Patout, is

1. A house fire alarm mechanism comprising a main wire adapted to bepassed through the several rooms, guides therefor, such wire having aseries of fusible joints, a series of alarm bells connected with suchwire and weights or tension devices at each end of such wire, allarranged substantially as shown, whereby as the said wires separate thetwo sections will be drawn outward and all the bells connected therewithoperated as set forth.

a 2. A house fire alarm mechanism comprisinga house wire having tensiondevices at each end, and having supplemental portions provided with loopsections, alarm bells, and

pivoted tripper devices therefor, adapted to normally hold the bellsfrom ringing, and

having portions extended into the said loop sections of the house wire,all arranged substantially as shown whereby such main wire will be heldfor a limited free movement in either direction before it engages thesaid trippers as and for the purposes described.

3. The herein described improved house fire alarm comprising a main wirehaving a series of fusible joints and a series of supplemental sectionshaving loop portions, guides for such wires and weights secured to theopposite endsthereof bell ringing devices includinga spring actuatedhammer, pivoted tripper levers having one end fitted to enter the loopportions of the supplemental wire sections, and their opposite ends heldto engage the spring actuated hammer, and be held to its normal positionby the spring of such ham- 5 mer substantially as specified.

JOHN P. WILLIAMS. Witnesses:

J 0s. A. RYAN, HARRY J. ROBINSON.

